How is this accomplished?

You are developing a new theme which inherits from the Magento_Luma theme.

How is this accomplished?
A . Add Magento/luma to theme.xml
B . Run the CLI command bin/magento dev:theme:inherit Magento_Luma
C . Specify the parent theme in Magento admin > Design > Configuration
D . Add Magento/luma to etc/view.xml

Answer: A

Explanation:

Reference: https://www.mageants.com/blog/how-to-create-custom-theme-in-magento-2.html